The addition, slated to be completed in 2018, is the latest development supported through the hospital's $475 million Promise campaign, a fundraising effort to "ensure the future of Texas Children's as a lead in pediatric and women's health," a release from the board states.

The new tower focuses on additional space for pediatric and cardiovascular intensive care, as well as new operating rooms. After the tower is completed, the Emergency Center and other areas in the hospital's West Tower will be renovated.

"These programs are at the core of our mission to create a healthier future for children throughout our broad community and will ensure the best possible outcomes for some of the nation’s sickest children," Mark A. Wallace, president and CEO of Texas Children’s Hospital, said in a statement. “The expansion will help us deliver on our promise to make Texas Children’s the best possible place to give and receive care."

The Promise campaign also encompasses other expansion projects within the Texas Children’s system, including Texas Children’s Hospital The Woodlands, which broke ground a year ago as part of Texas Children's Hospital's 60th birthday celebration. That facility is expected to open its doors in 2017.